Abstract:In this study, it is investigated the synthesis and characterizations of polymerizable vinyl sugars. Carbohydrate containing polymers were synthesized via free radical polymerization. Thermal behavior of polymer derivatives was analyzed by using DSC and TG. Molecular weight dispersion of polymer derivatives was also analyzed with GPC. Molecular structures were analyzed by FT-IR and 1H-NMR spectrophotometer. We found that molecular weight of copolymers could effect to the thermal stability. According to TG data related to the copolymers, molecular weight of polymers increased while the thermal stability decreased. Thermogravimetric analysis of polymers also investigated. The apparent activation energies for thermal degradation of carbohydrate containing polymers were obtained by integral methods (Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose, and Tang).
Poly(eugenol-co-methylmethacrylate)/polypropylene blends were successfully prepared using methyl methacrylate (MMA), eugenol (Eg) and polypropylene (PP). First, poly(eugenol-co-methylmethacrylate) (poly(Eg-co-MMA)) was synthesized by photopolymerizaiton in one step at ambient temperature and without solvent. Benzophenone and triethylamine were used as photoinitiator and hydrogen donor, respectively. The second stage is the blending approach between polypropylene and poly(Eg-co-MMA) copolymer. The anti-bacterial test was carried out using the agar well diffusion. Escherichia coli, Staphylococcus aureus bacterial species were tested using Clinical and Laboratory Standards Institute (CLSI) Disk-Diffusion method in antibacterial analysis. As a result of these studies, the blend polymers (PEgMMA 1:1 ) 30 -PP and (PEgMMA 1:1 ) 50 -PP showed activity against E. coli Gram-negative bacteria. Zone diameters are 7 ± 0.00 mm and 5.25 ± 0.25 mm for (PEgMMA1:1) 30 -PP and (PEgMMA1:1) 50 -PP, respectively. No activity has been observed against S. aureus bacteria. In antimicrobial tests, it was determined that the polymers did not show a high antibacterial property as expected. Structural characterization and thermal properties of the synthesized terpolymers were performed by FTIR (Fourier-transform infrared spectroscopy), 1 H NMR (nuclear magnetic resonance spectroscopy), TG-DTG (thermogravimetry-derivative thermogravimetry). SEM (scanning electron microscope) was used for surface analysis. The thermal stability of the synthesized blend polymers was higher than their homopolymers. Structural characterizations and surface analyzes support the successful performance of the synthesis.
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